If you decide to do re-alignment, check the parts. Excessive wear on parts combined with damaged roads or heavy off-road driving will throw off the re-alignment at some point. Also, check your struts for bleeding/corrosion or just a really bouncy ride. Then look at your brakes, if they have heavy wear or deep markings, clean them off and see how they look. Do not just look at the front but also the rear. The downforce when braking puts twice the load of the 2 front tires. So if your struts and brakes are not up to par, you will have issues. I have a PF SE 03 2WD w/ option to use 4WD and have gone through 2 sets of tires (Dunlop and Falken). These are LL TERRAIN. Currently I am on the Falkens. PF's have weight issues that really can not be overcome. It is a heavy vehicle. We all drive ours differently whether casual/aggressive, off-road, towing or combination. What I am going to do is rotate my tires more often to have even wear. Try this with your current or newly purchased tires. Take your LF and move it to the RB, and take your RF to your LB.